Aisne River

Aisne River, northeastern French river that rises in the forests of Argonne near Vaubecort and flows northwest and west to join the Oise river near Compiègne. The Aisne is about 180 mi (290 km) long. The valley of the Aisne was the scene, during World War I, of prolonged trench warfare and was crossed in World War II by the U.S. Army during its Aug. 1944 offensive.

See also: World War I; World War II.